lkml.org 
[lkml]   [2014]   [Sep]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3.16 072/158] MIPS: Malta: Improve system memory detection for {e, }memsize >= 2G
Date
3.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Markos Chandras <markos.chandras@imgtec.com>

commit 64615682658373516863b5b5971ff1d922d0ae7b upstream.

Using kstrtol to parse the "{e,}memsize" variables was wrong because this
parses signed long numbers. In case of '{e,}memsize' >= 2G, the top bit
is set, resulting to -ERANGE errors and possibly random system memory
boundaries. We fix this by replacing "kstrtol" with "kstrtoul".
We also improve the code to check the kstrtoul return value and
print a warning if an error was returned.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7543/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/mips/mti-malta/malta-memory.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)

--- a/arch/mips/mti-malta/malta-memory.c
+++ b/arch/mips/mti-malta/malta-memory.c
@@ -34,13 +34,19 @@ fw_memblock_t * __init fw_getmdesc(int e
/* otherwise look in the environment */

memsize_str = fw_getenv("memsize");
- if (memsize_str)
- tmp = kstrtol(memsize_str, 0, &memsize);
+ if (memsize_str) {
+ tmp = kstrtoul(memsize_str, 0, &memsize);
+ if (tmp)
+ pr_warn("Failed to read the 'memsize' env variable.\n");
+ }
if (eva) {
/* Look for ememsize for EVA */
ememsize_str = fw_getenv("ememsize");
- if (ememsize_str)
- tmp = kstrtol(ememsize_str, 0, &ememsize);
+ if (ememsize_str) {
+ tmp = kstrtoul(ememsize_str, 0, &ememsize);
+ if (tmp)
+ pr_warn("Failed to read the 'ememsize' env variable.\n");
+ }
}
if (!memsize && !ememsize) {
pr_warn("memsize not set in YAMON, set to default (32Mb)\n");



\
 
 \ /
  Last update: 2014-09-15 23:41    [W:0.392 / U:0.788 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site